Rubber-like mass containing olefine naphthalene polymerizates



Patented Dec. 12 1933 UNITED STATES PATENT OFFICE RUBBER-LIKE MASS comrammc OLEFINE NAPHTHALENE ronmmza'rss Kurt Meisenburg, Leverkusen-I. G. Wei-k, and- Walter Bock, Cologne-Mulheim, Germany, assignors to I. G. Farbenindustrie Aktiengesell- 'schaft, Franktort-on-the-Main, Germany No Drawing. Original application July 10, 1930,

Serial No. 467,125, and in Germany April 2 1930. Divided and this application May 15, 1933. Serial No. 671,28

3 Claims. ((21. 260-6) OHFO III-(l) =0 H:

wherein a means hydrogen or methyl, with a polymerization product of an olefine naphthalene, such as alpha-vinyl-naphthalene, polyvinylnaphthalenes, homologues of these compounds and the like. The efiecting of complete interpenetration of the butadiene hydrocarbonand olefine naphthalene polymerizate is best performed by mixing the different hydrocarbons and causing polymerization of the mixture either by simple heating, for example, to about 40-80 C., or in emulsion with water and an emulsifying agent or an emulsoid colloid, preferably while gently.

heating the emulsion to about 30-70 C., while shaking or stirring the mixture. It will be likewise possible to intimately. mix incompletely polymerized butadiene hydrocarbons with incompletely polymerized olefine naphthalenes,'which polymerized products should still possess a somewhat viscous character, by mechanical means, and causing further polymerization of the mixtures thus obtained accordingto one of the processes above mentioned with or without the addition of further butadiene hydrocarbons and/or oleflne naphthalene hydrocarbons. Obviously, our mixed rubber-like masses can also be obtained by at first partially polymerizing a butadiene hydrocarbon, then adding an olefine naphthalene hydrocarbon and further polymerizing according to one of the methods described above or vice versa.

It may be mentioned thatin the claims the expression effecting complete interpenetration oi the various polymerizates is intended to define the modifications defined above. Obviously, also such processes are within the scope of this expression in which ingredients known to favorably influence the polymerization processes in question, such as oxygen, substances splitting 01! oxygen under the conditions of working, metal oxides, electrolytes and the like are employed.

The-different hydrocarbons or the incompletely polymerized products should be applied-in such amounts that the finished rubber-like masses contain below about by weight of the olefine naphthalene polymerizate. The best results are generally obtained whenemploying the'olefine naphthalene in an amount that the mixed rubber-like masses contain between about 15-40 by weight of the olefine naphthalene polymerizate.

Instead of the pure butadiene hydrocarbons or pure oleflne naphthalenes the cheaper technical raw products or mixtures of butadiene with isoprene and/or mixturesof different olefine naphthalenes or the incompletely polymerized products of said products may be employed in many cases with good results.

' It will be of advantage in some cases to add' -like, by which additions the character of the flnal' products can be somewhat altered.

The mixed polymerization products thus obtainable are in contradistinction to many other artificial rubber-like masses very plastic and easily workable on rollers, and yield vulcanization products of high technical value, especially when vulcanized after the-addition of a suitable soot variety. Y It may be mentioned that the use of oleflne naphthalenes compared with .the use of oleflne benzenes has the advantage that the mixed polymerizates containing ole e phthalenes are generally obtained in a better yield than those containing oleflne benzenes, and. that they are generally still more plastic and more easily workable on rollers. Oleflne benzenes and oleflne naphthalenes can therefore not be considered as equivalents in polymerization processes.

As mentioned above our new/mixed polymerization products-are very plastic and easily workable on rollers, in consequence of which fact they very easily take up fillers, such as soot, colloidal silicic acid, aluminium oxide, zinc oxide and the mixed polymerization products of pronounced and valuable rubber-like properties according to the present invention is most surprising, since oleflne naphthalene polymerizates are generally resins and not rubber-like products.

Furthermore, it should be pointed out the valuable rubber-like polymerization products described and claimed herein are not obtained when simply mixing completely polymerized products from butadiene or isoprene and from olefine naphthalene hydrocarbons, nor are the valuable polymerizates of the present invention obtained, when, for example, alpha-vinylnaphthalene or another olefine naphahtlene hydrocarbon is polymerized in the presence of completely polymerized butadiene or isoprene or vice versa. Likewise, mixed polymerization products obtainable by mixing solutions of, for example, completely polymerized alpha-vinylnaphthalene with solutions of completely polymerized butadiene or isoprene and evaporating of the solvent do not possess the valuable properties of our new rubber-like masses, it being a characteristic feature of the present invention that both the olefine naphthalene and the butadiene or isoprene component must still be polymerizable and must be polymerized in admixture with one another.

The following examples illustrate our invention, without limiting it thereto, the parts being by volume:

Example 1 65 parts of butadiene-(L3), 10 parts of alphavinylnaphthalene, 100 parts of a 10% aqueous solution of sodium oleate and 3 parts of 1/1 normal caustic soda solution are emulsified in a pressure vessel and polymerized with agitationfor 5 days at 60 C. A cream-like paste is obtained, which can be coagulated by acidification.

or by cooling. The yield of the coagulate obtained amounts to about of the theoretical amount. On vulcanizing the coagulation product with the addition of lamp black, a soft rubber-like mass of high tensile strength and elasticity is obtained.

By employing in the above example 8 parts of 1/1 normal caustic soda solution instead of the 3 parts mentioned, the yield of the polymerization product is increased for about 35%. The mixed rubber-like mass thus obtainable yields a vulcanization product similar to that described in the first part of the example, but possesses a considerably higher stretch.

Example 2 75 parts of butadiene-(1.3), 20 parts of alphavinylnaphthalene, parts of a 10% aqueous solution of sodium oleate and 3 parts 1/1 normal caustic soda solution are emulsified and polymerized as described in Example 1. Aft-er coagulation of the latex like mass, a strong plastic polymerization product is obtained in a yield of about 94% of the theoretical amount and the vulcanization product of the latter, besides possessing ahigh tensile strength and. a good elasticity, is especially distinguished by a good stretch.

Example 3 68 parts of butadiene-(LS) and 20 parts of vinylnaphthalene are emulsified with 80 parts of a 2% aqueous solution of the hydrochloride 0! the diethylaminoethoxyanilide of oleic acid, and the emulsion is agitated for 4 days at 60 C. A latex-like paste is obtained in an almost quantitative yield, from which the mixed rubber-like mass can be obtained by coagulation.

This is a division of our co-pending application Serial No. 467,125 filed July 10th, 1930, now Patent 1,915,745 of June 27, 1933.

We claim:-

1. The process which'comprises effecting complete interpenetration of a heat or emulsion polymerizate derived from a compoundof the probable formula:-

wherein .1: stands for hydrogen or methyl, with a heat or emulsion polymerizate derived from a vinyl naphthalene hydrocarbon in such a manner that the mixed polymerizate contains below about 45% by weight of the vinyl naphthalene polymerizate.

2. The process which comprises effecting complete interpenetration of a heat or emulsion polymerizate derived from a compound of the probable formula:--

wherein :1: stands for hydrogen or methyl, with a heat or emulsion polymerizate derived from a vinyl naphthalene hydrocarbon in such a manner that the mixed polymerizate contains between about 15-40% by weight of the vinylnaphthalene polymerizate.

3. The process which comprises effecting complete interpenetration of a heat or emulsion polymerizate derived from a compound of the probable formula:--

wherein :1: stands for hydrogen or methyl, with a heat or emulsion polymerizate derived from alpha-vinylnaphthalene, in such a manner that the mixed polymerizate contains below about 45% by weight of the alpha-vinylnaphthalene polymerizate.

4. The process which comprises incorporating and effecting complete interpenetration of a heat or emulsion polymerizate derived from a compound of the probable formula:--

wherein :0 stands for hydrogen ,or methyl, with a heat or emulsion polymerizate derived from alpha-vinylnaphthalene in such a manner that the mixed polymerizate contains between about 15-40% by weight of the alpha-vinylnaphthalene polymerizate.

5. The polymerization products obtained according to the process claimed in claim 1, said polymerization products possessing a..good plasticity, easily taking up ingredients usually apcording to the process claimed in claim 3, said polymerization products possessing a good plasticity, easily taking up ingredients usually apticity, easily taking up ingredients usually applied in vulcanization processes and yielding, when vulcanized in the presence of carbon black, vulcanization products of high tensile strength and superior resistance to abrasion.

KURT URG. WALTER ROCK.- 

